Diet, gut health and depression link emphasised by new Australian risk index

A new Risk Index for Depression (RID) developed in Australia "provides further support" of the link between diet, gut health and the risk of mental illness, researchers claim.

The RID, developed by Swinburne University of Technology lecturer Dr Joanna Dipnall, revealed that an individual is more likely to become depressed if their diet is poor, their lifestyle is erratic and they do not exercise.

Dr Dipnall, who lectures in the Department of Statistics Data Science and Epidemiology, said she developed the RID to help identify the most common risk factors for depression, and to give health professionals an early intervention tool.

The research found that the risk of depression is most closely linked to diet, followed by physiological factors and then lifestyle patterns, such as sleep and exercise.

While diet has long been associated with mental health, Dr Dipnall said more research now needs to be conducted on the role the gut plays in mental health.

She added that a fibre-rich diet is the key to a healthy mind.

"​Dietary fibre appears central to gut health, which has recently been a key focus of depression research. Our findings provide further support for diet as a key modifiable factor in gut health, and in depression risk."​